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radeonsi/nir: perform radeonsi-specific lowering and optimization passes

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Nicolai Hähnle 2017-06-24 17:48:22 +02:00
parent b49c2c9fa3
commit 41d4016e06
1 changed files with 41 additions and 0 deletions
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41
src/gallium/drivers/radeonsi/si_shader_nir.c
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@ -337,6 +337,47 @@ si_lower_nir(struct si_shader_selector* sel)
variable->data.driver_location += 1;
}
}
/* Perform lowerings (and optimizations) of code.
*
* Performance considerations aside, we must:
* - lower certain ALU operations
* - ensure constant offsets for texture instructions are folded
* and copy-propagated
*/
NIR_PASS_V(sel->nir, nir_lower_returns);
NIR_PASS_V(sel->nir, nir_lower_vars_to_ssa);
NIR_PASS_V(sel->nir, nir_lower_alu_to_scalar);
NIR_PASS_V(sel->nir, nir_lower_phis_to_scalar);
bool progress;
do {
progress = false;
/* (Constant) copy propagation is needed for txf with offsets. */
NIR_PASS(progress, sel->nir, nir_copy_prop);
NIR_PASS(progress, sel->nir, nir_opt_remove_phis);
NIR_PASS(progress, sel->nir, nir_opt_dce);
if (nir_opt_trivial_continues(sel->nir)) {
progress = true;
NIR_PASS(progress, sel->nir, nir_copy_prop);
NIR_PASS(progress, sel->nir, nir_opt_dce);
}
NIR_PASS(progress, sel->nir, nir_opt_if);
NIR_PASS(progress, sel->nir, nir_opt_dead_cf);
NIR_PASS(progress, sel->nir, nir_opt_cse);
NIR_PASS(progress, sel->nir, nir_opt_peephole_select, 8);
/* Needed for algebraic lowering */
NIR_PASS(progress, sel->nir, nir_opt_algebraic);
NIR_PASS(progress, sel->nir, nir_opt_constant_folding);
NIR_PASS(progress, sel->nir, nir_opt_undef);
NIR_PASS(progress, sel->nir, nir_opt_conditional_discard);
if (sel->nir->options->max_unroll_iterations) {
NIR_PASS(progress, sel->nir, nir_opt_loop_unroll, 0);
}
} while (progress);
}
static void declare_nir_input_vs(struct si_shader_context *ctx,